Rasmussen S
Kvinneklinikken, Regionsykehuset i Tromsø.
Tidsskr Nor Laegeforen. 1993 Nov 10;113(27):3366-8.
The benefits of routine use of ultrasound dating of pregnancy have been questioned. With ultrasound dating, the expected date of delivery is often postponed later than calculated. This means that true post-term pregnancies may be undetected and second-trimester determination of gestational age could represent a risk to the infants' health. This possibility has been assessed in a population of ultrasound screened women with optimal conditions for dating the pregnancy by Naegeles rule. No perinatal complications due to undetected post-term pregnancies were found.
常规使用超声确定妊娠日期的益处受到了质疑。通过超声确定日期，预计分娩日期往往比计算的要推迟。这意味着真正的过期妊娠可能未被发现，而孕中期确定胎龄可能对婴儿健康构成风险。在一组通过内格莱规则确定妊娠日期条件最佳的超声筛查女性群体中评估了这种可能性。未发现因未检测到的过期妊娠导致的围产期并发症。
